Triangle read by rows: T(n, k) = binomial(n + k - 1, 2*k - 1) * 4^(k - 1) * n/k, 1 <= k <= n.

Terms

a(0) =1a(1) =4a(2) =4a(3) =9a(4) =24a(5) =16a(6) =16a(7) =80a(8) =128a(9) =64a(10) =25a(11) =200a(12) =560a(13) =640a(14) =256a(15) =36a(16) =420a(17) =1792a(18) =3456a(19) =3072a(20) =1024a(21) =49a(22) =784a(23) =4704a(24) =13440a(25) =19712a(26) =14336a(27) =4096a(28) =64a(29) =1344